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09.18.2008 at 02:29PM PDT, ID: 23744088
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5.0

Why is my mySQL Query running so slow!?

Asked by stellaartois in PHP and Databases, MySQL Server

Hi All,

I am building a lyrics website that allows users to search lyrics fully.  I have a seperate table for all Song Lyrics, Songs, Albums and Artists.

I have taken all of the lyrics and song names and indexed them in another table by weight per word.

When I type in to the search box and submit the form, the form retrieves the data from the tables using the following query:

SELECT search_index.song_id AS song_id, songs.song_name AS song_name, COUNT(*) AS nb, SUM(search_index.weight) AS total_weight, songs.album_id AS album_id, songs.artist_id AS artist_id, albums.album_name AS album_name, artists.artist_name AS artist_name, albums.album_date AS album_date FROM search_index LEFT JOIN (songs, albums, artists) ON (search_index.song_id = songs.song_id AND songs.album_id = albums.album_id AND albums.artist_id = artists.artist_id) WHERE (search_index.word='[SEARCH WORD]' OR word='[SEARCH WORD]') GROUP BY search_index.song_id ORDER BY nb DESC, total_weight DESC LIMIT 20

The code snippet is the structure of my tables.  They are all linked by ID's.

It runs really really slow and i dont know what tacktic to take to speed it up.

ThanksStart Free Trial 
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CREATE TABLE IF NOT EXISTS `albums` (
  `album_id` int(10) NOT NULL auto_increment,
  `artist_id` int(10) NOT NULL default '0',
  `album_name` varchar(255) NOT NULL default '',
  `album_url` varchar(255) NOT NULL,
  `album_date` varchar(10) NOT NULL,
  `album_art` varchar(255) NOT NULL,
  PRIMARY KEY  (`album_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=36136 ;
 
-- --------------------------------------------------------
 
--
-- Table structure for table `artists`
--
 
CREATE TABLE IF NOT EXISTS `artists` (
  `artist_id` int(10) NOT NULL auto_increment,
  `artist_name` varchar(255) NOT NULL default '',
  `artist_url` varchar(255) NOT NULL default '',
  PRIMARY KEY  (`artist_id`),
  UNIQUE KEY `artist_name` (`artist_name`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=7953 ;
 
-- --------------------------------------------------------
 
--
-- Table structure for table `lyrics`
--
 
CREATE TABLE IF NOT EXISTS `lyrics` (
  `lyrics_id` int(10) NOT NULL auto_increment,
  `artist_id` int(10) NOT NULL,
  `album_id` int(10) NOT NULL,
  `song_id` int(10) NOT NULL default '0',
  `song_lyrics` longtext NOT NULL,
  `lyrics_url` varchar(255) NOT NULL,
  PRIMARY KEY  (`lyrics_id`),
  UNIQUE KEY `song_id` (`song_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=411424 ;
 
-- --------------------------------------------------------
 
--
-- Table structure for table `moved_artists`
--
 
CREATE TABLE IF NOT EXISTS `moved_artists` (
  `artist_id` int(10) NOT NULL default '0',
  `artist_name` varchar(255) NOT NULL default '',
  `artist_url` varchar(255) NOT NULL default '',
  PRIMARY KEY  (`artist_id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 
-- --------------------------------------------------------
 
--
-- Table structure for table `search_index`
--
 
CREATE TABLE IF NOT EXISTS `search_index` (
  `word_id` int(10) NOT NULL auto_increment,
  `artist_id` int(10) NOT NULL,
  `song_id` int(10) NOT NULL,
  `word` varchar(225) NOT NULL default '',
  `weight` int(10) NOT NULL default '0',
  UNIQUE KEY `word_id` (`word_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=27182361 ;
 
-- --------------------------------------------------------
 
--
-- Table structure for table `songs`
--
 
CREATE TABLE IF NOT EXISTS `songs` (
  `song_id` int(10) NOT NULL auto_increment,
  `artist_id` int(10) NOT NULL default '0',
  `album_id` int(10) NOT NULL,
  `song_name` varchar(255) NOT NULL default '',
  `song_url` varchar(255) NOT NULL default '',
  PRIMARY KEY  (`song_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=415872 ;
 
Keywords: Why is my mySQL Query running so sl…
Title
1 Lyrics
2 Lyrics
3 avoiding redundant entries in a databa…
4 My Query is returning duplicates (sort…
5 lyrics search
6 trivia: song title, album and artist
 
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[+][-]09.18.2008 at 02:32PM PDT, ID: 22515727

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[+][-]09.18.2008 at 02:33PM PDT, ID: 22515742

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[+][-]09.18.2008 at 04:47PM PDT, ID: 22516668

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[+][-]09.19.2008 at 04:33AM PDT, ID: 22519935

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[+][-]09.19.2008 at 04:50AM PDT, ID: 22520077

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Zones: PHP and Databases, MySQL Server
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Solution Provided By: cxr
Participating Experts: 3
Solution Grade: B
 
 
[+][-]09.19.2008 at 07:12AM PDT, ID: 22521249

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[+][-]09.19.2008 at 01:11PM PDT, ID: 22525056

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